Improvement in connections for pipes of malleable metal



".PETERS, PHOTO-LITHOGRAPHER. WASHINGYON. D C.

initd tant aient (twine.

W. H. HARRISON, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 98,961, dated January 18, 1870.

IMPROVEMENT IN CONNECTIONS FORY PIPES OF MALLEABLE METAL.

The Schedule referred to in these Letters Patent and making peut of thesame.

I, W. H. HARRISON, of Philadelphia, Pennsylvania,

have invented an Improvement in Securing lipes of Malleable Metaltogether, of which the following is a specification.

Nature and Object of the Invention.

My invention consists of two or more pipes of `inalleable metal, attenedat and near the ends, and adapted and secured to internal castings, andhaving countersunk openings, adapted to connecting-pipes,

' all substantially as described hereafter.

external liattened tube, prior to the upsetting ot' the latter.

General Description.

A represents part of au ordinary lap-welded tube, flattened at and nearthe end, on opposite sides, so as to have the sectional form representedin lig. 4, and two holes, c a, are bored, one through each {iat-tenedside of the tube.

B is a hollow casting, flat on opposite sides, and munded on theopposite edges, so as to conform to and fit snugly in the interior ci'the flattened end of the tube A; and this casting Vhas holes, b b, ofthe same size, or nearly so, as the. holes a a in the tube, andcoincidingwith the latter when the easing is titted to its place'. 1

The tube A is connected to the casting B by any vdesrednumber of boltsor rivets d d, each of which passes through a stay, e, forming part ofthe casting, and connecting together the opposite sides of the same.

Each hole l1 of the casting B is countersunk, so as to'form a concaveedge, x, into which the metal of the tube A, at the edge of the opening,is upset, as shown in lig. 3, and the metal thus upset is countersunk,so as to form a concave edge, g. 3.

A number of tubes thus prepared, with attened ends and internalcastings, may be connected together, as shown in iig. 1, where Drepresents the connectingpipe between two tubes A and A', this pipebeing made convex at each end n1, one convex end being adapted to theconcave edge y of the opening in the tube A, and the other end 'of thepipe to the concave edge of the opening in the tube A.

The desired number of tubes A and A having been arranged side by side,with intervening connecting.

pipes D, the whole are connected together by a bolt, E, passing throughthe pipes 1)aud through the holes in the tubes, each e'nd tube A of theseries having a washer, f, adapted to the bevelled edge y of the hole inthe tube.

In the present instance, the casting B projects beyond the end ofthetube A, the projecting portion being rounded, as shown in iig. 1, andhaving two openings, 71. 71, in each of which is cut a screw-thread, forreceiving a screw-plug. These openings possess the double advantageofiacilitatingthe preparation of the moulds for the castings B, and ofpermittingready access to the tubes for cleansing-purposes.

A number of tubes may be connected together, in the manner descrlbedabove, so as to form a steamboiler or'heater; and, as the j nn'etion oi'all the pipes is -by ball-and-sockct joints, (owing to the convex endsof the pipes,D, and the concave edges y of the openings in the tubes,)liberty is afforded for the free and independent contraction andexpansion 'of the parts, with. out atiecting the integrity ot' thejoints.

y In somelcases, the edges y of the openings in the tubes may bc simplybevelled or inclined, the ends ot' the connecting-pipes being bevelledaccordingly; but I prefer, in most cases, to make the joints ot' aballand-socket character, for the reasons given above.-

C' Zaini Two or more pipes, A and A',- of malleable metal, flattened atand near the ends, and adapte-d and secured to internal castingsB, andhaving countersunkv openings, adapted to connecting-pipes D, allsubstantially as set forth. v

In testimony whereof, I have signed Iny" name to this specification, inthe presence ot' two subscribing

